Cefdinir colon-positioning enteric tablet
A technology of cefdinir and nicolon, applied in the new field of medicine, to achieve the effect of improving therapeutic effect, reducing side effects and improving compliance
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Embodiment 1
[0026] Example 1 pH-controlled cefdinir colon-localized preparation,
[0027] Tablet core formula 1
[0028] Cefdinir 100g
[0029] Sodium carboxymethyl starch 6g
[0030] Lactose 30g
[0031] Povidone 2.5g
[0033] 75% ethanol solution 50ml
[0034] Tablet core formula 2
[0035] Cefdinir 100g
[0036] Sodium carboxymethyl starch 6g
[0037] Starch 30g
[0038] Povidone 3.5g
[0040] 75% ethanol solution 50ml
[0041] Tablet core formulation 3
[0042] Cefdinir 100g
[0043] Low-substituted hydroxypropyl methylcellulose 15g
[0044] Starch 20g
[0045] Methylcellulose 3g
[0047] 75% ethanol solution 50ml
[0048] Tablet core formulation 4
[0049] Cefdinir 200g
[0050] Low-substituted hypromellose 15g
[0051] Lactose 20g
[0052] Povidone 3g
[0053] Micronized silica gel 7.5g
[0054] Acetone 50ml
[0055] Coating Solution Formula 1
[0056] Acrylic resin S100 10g...
Embodiment 2
[0075] Example 2 Time-controlled cefdinir colon-localized drug release preparation
[0076] Tablet core formula is with embodiment 1.
[0077] Preparation of time-controlled coating solution: dissolve the acrylic resin in a solvent and add other components and stir evenly.
[0078] Tablet cores are coated in multiple layers. The composition of the inner coating liquid is 8 g of hypromellose, and the solvent is 200 ml of 70%-90% ethanol. The sub-outer coating solution is composed of 3 g of ethyl cellulose, 0.3 g of hypromellose, and 100 ml of ethanol with a solvent content of 70%-90%. By controlling the thickness of the film, the time lag is adjusted. The release time lag is 3-4 hours. The outermost layer is coated with ethanol solution of acrylic resin L100. Through the dissolution test, the results showed that the coated tablet began to dissolve in the small intestine, and the release time lag was 3.5 hours.
Embodiment 3
[0079] Example 3 Time-controlled and pH-dependent colon-localized formulations
[0080] Tablet core formula is with embodiment 1.
[0081] Time control layer coating solution formula 1:
[0082] Acrylic resin E100 50g
[0083] Povidone 15g
[0084] Macrogol 6000 5g
[0085] Ethanol 500ml
[0086] pH control layer coating solution formula 1:
[0087] Acrylic L100 8g
[0088] Acrylic resin S100 2g
[0089] Diethyl phthalate 4ml
[0090] Castor oil 6ml
[0091] Tween-80 2ml
[0093] Ethanol 200ml
[0094] Time control layer coating liquid formula 2
[0095] Ethylcellulose 25g
[0096] Hypromellose 5g
[0097] Macrogol 6000 5g
[0098] Ethanol 500ml
[0099] pH control layer coating liquid formula 2
[0100] Acrylic S100 30g
[0101] Triethyl citrate 5g
[0102] Talc powder 7.5g
[0103] Ethanol 500ml
[0104] The preparation method of the pH-controlled coating liquid formulation is the same as in Example 1, and the preparation method o...
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